From 9cec54c83a8baba3099bb8b445a735b93ab9511f Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Fri, 11 May 2018 11:49:27 -0400 Subject: ovl: Initialize ovl_inode->redirect in ovl_get_inode() ovl_inode->redirect is an inode property and should be initialized in ovl_get_inode() only when we are adding a new inode to cache. If inode is already in cache, it is already initialized and we should not be touching ovl_inode->redirect field. As of now this is not a problem as redirects are used only for directories which don't share inode. But soon I want to use redirects for regular files also and there it can become an issue. Hence, move ->redirect initialization in ovl_get_inode(). Signed-off-by: Vivek Goyal Reviewed-by: Amir Goldstein Signed-off-by: Miklos Szeredi --- fs/overlayfs/inode.c | 3 +++ fs/overlayfs/namei.c | 8 +------- fs/overlayfs/overlayfs.h | 1 + 3 files changed, 5 insertions(+), 7 deletions(-) (limited to 'fs/overlayfs') diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c index 28ee802e6eaf..4833545d709b 100644 --- a/fs/overlayfs/inode.c +++ b/fs/overlayfs/inode.c @@ -844,6 +844,7 @@ struct inode *ovl_get_inode(struct super_block *sb, } dput(upperdentry); + kfree(oip->redirect); goto out; } @@ -867,6 +868,8 @@ struct inode *ovl_get_inode(struct super_block *sb, if (oip->index) ovl_set_flag(OVL_INDEX, inode); + OVL_I(inode)->redirect = oip->redirect; + /* Check for non-merge dir that may have whiteouts */ if (is_dir) { if (((upperdentry && lowerdentry) || oip->numlower > 1) || diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c index c993dd8db739..ebc377bd010a 100644 --- a/fs/overlayfs/namei.c +++ b/fs/overlayfs/namei.c @@ -1009,19 +1009,13 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry, .lowerpath = stack, .index = index, .numlower = ctr, + .redirect = upperredirect, }; inode = ovl_get_inode(dentry->d_sb, &oip); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_free_oe; - - /* - * NB: handle redirected hard links when non-dir redirects - * become possible - */ - WARN_ON(OVL_I(inode)->redirect); - OVL_I(inode)->redirect = upperredirect; } revert_creds(old_cred); diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h index 16d439ebfe02..69010e3dd846 100644 --- a/fs/overlayfs/overlayfs.h +++ b/fs/overlayfs/overlayfs.h @@ -335,6 +335,7 @@ struct ovl_inode_params { struct ovl_path *lowerpath; struct dentry *index; unsigned int numlower; + char *redirect; }; struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, dev_t rdev); struct inode *ovl_lookup_inode(struct super_block *sb, struct dentry *real, -- cgit